Improvement in detachable calks for horseshoes



. mcsneson.

Detachable cams for Hurseshnes. N0.147,4`|7.

Patented Feb. 10. 1874.

i NITED STATES PATENT Orrron GEORGE MOGREGOR, OF CINCINNATI, OHIO, ASSIGNOR TO HIMSELF AND JOHN B. MORRIS, OF SAME PLACE.

IMPROVEMENT IN DETACHABLE CALKS FOR HORSESHOES.

Specification forming part of Letters Patent No. 147,417, dated February 10,1874; application filed December 13, 1873.

To all whom t may concern:

Be it known that I, GEORGE MeGREeoR, of Cincinnati, Hamilton coiuity, State of Ohio, have invented a certain new and useful Improvement in Detachable Calk Plates for Horseshoes, of which the following is a specication:

My invention relates to the class of devices designed for attachment to horseshoes in winter, during the presence of ice or snow, to prevent slipping; and my invention consists, first, in a certain construction and combination of parts by which the calli-plate is secured to the ordinary horseshoe, and at the same time the clamping-bars held from rotation or other displacement; second, in a peculiar device for preventing' the displacement, loss, or loosening of the fastening-screws; third, in a certain combination of parts by which the calliplate is not only held iirmly against the shoe, but is also secured laterally in a manner adapted to accommodate itself to different sizes of shoes.

Figure lis a perspective view of the calliplate with the clamps detached. #Fig 2 is a plan of the same connected together. Fig. 3 is an interior section of the calli-plate, clamp, connecting-screw, and horseshoe. Fig. 4 is a section, front to rear, showing the calkplate upon the shoe. Fig. 5 is an enlarged view of the device for retaining the fastening-screws.

A is the callcplate, which is tted with sharp calks a to prevent slipping. The plate is of such a size that it more than covers the interior of the horseshoe F, as shown in dotted lines in Fig. 2, and, owing to the continuity of surface in the plate A, snow cannot accumulate so as to "ball7 under the shoe. B B' are clamps, which engage between the shoe and the foot of the horse, as shown in Fig. 3, to enable the attachment of the plate A to the shoe F by screws C; and, in order to prevent the displacement of these clamps during the process of fastening on the calkplate, or afterward, I provide projections a" on the plate A, which extend sufficiently above the upper surface of plate A to embrace the central hub and sides of the clamps B B', n the manner clearly shown in Figs. 2 and 4.

For the purpose of preventing the accidental withdrawal ofthe screws C while in use, I swage the annular projecting metal of plate A over the heads of the screws after their insertion in the plate, a washer, c, being preferably interposed between the. head of the screw and the swaged metal, as shown in the left-hand part of Fig. 5. This device, while permitting the free revolution of each screw in the plate A for attachment or-removal of the plate from the clamps B B', prevents the withdrawal of either of the two screws in any other way than by the systematic revolution of both nearly together, and to the same eX- tent, as, if one screw is forced out alone for a short distance, the entire structure is locked, and finther withdrawal of this screw is prevented. A partition or rib, a3, crosses the plate A, in the manner shown, over which the collars c of the screw E fit, so as to permit the revolution of the screw without permitting its -end movement. To this screw abi-ac ing-plate, D, is fitted to slide longitudinally; and, owing to the fact of the converging character of the sides of the shoe, and the eorrespending shape of this brace D, a longitudinal movement of the brace in the direction of the heels suffices to key the brace firmly in between the sides of the shoe, and to thus v prevent the calli-plate moving laterally, the clamp B, front projections a", and the same brace also preventing movement from front to rear, or rear to front.

I claiml. llhe combination of calkplateA a, clamps B B', and screws C, when the calli-plate is provided with projections a' 'embracing the clamps, substantially in the manner and for the purpose speciiied. i

2. The combination of calk-plateA a, clamps B B', and screws C, when the plateA is swaged over the heads of the screws, substantially in the manner and for the purpose specified.

3. The combination of calk-plate A c, clamps B B', screws C, and side brace D E, operating substantially in the manner and for the purpose specified.

In testimony of which invention I hereunto set my hand.

enonen Meenneon.

Witnesses FRANK MrLLwARD, JEROME D. Cenni). 

